Question

Which is one characteristic shared by electromagnetic and mechanical waves?

Both have a frequency and amplitude.
Both move due to particles bumping into each other.
Both are formed by charged particles.
Both occur as a result of a disturbance.

Answer 1

Both occur as a result of a disturbance.

Explanation: A wave is a disturbance that transfers energy through a medium (mechanical) or through fields (electromagnetic). While both also have frequency and amplitude, the defining common feature is that they originate from a disturbance that propagates.